Answer:
Covalent bonds appear inside every linear chain and connect bases, sugars, and phosphate groups.
Hydrogen bonds appear between two strands and involve the base from one strand with the base from another strand in the complementary pairing.
Explanation:
A covalent bond is a chemical bond formed by joining electrons of two non-metal atoms into one or more common pairs.
A hydrogen bond (X-bond) is a type of weak chemical bond based on electrostatic attraction between a hydrogen atom and a nucleophilic atom that contains free electron pairs.
The first one is the 3rd option and the 2nd one is also the 3rd option
The Mitochondria's main function is to create ATP, otherwise known as <span>adenosine triphosphate. ATP is a type of energy, so mitochondria do create energy. Therefore, the answer to your query is true. Hope this helps and have a great day!</span>
DNA is going to be the answer
